What this means
The IEEE assigned the MA-L block CC944A to Pfeiffer Vacuum GmbH. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting CC:94:4A, it is Pfeiffer Vacuum GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix CC944A?
CC944A is registered to Pfeiffer Vacuum GmbH in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. Pfeiffer Vacuum GmbH's block covers 16,777,216 addresses.
What devices use CC944A?
Any network device with a MAC address starting CC:94:4A was manufactured by or for Pfeiffer Vacuum GmbH.